Metal Bellows & Assemblies

MADE IN THE USA

Precision Metal Bellows & Bellows Assemblies for Motion and Flow Control Systems

With over a century of engineering expertise, Flex-Weld designs and manufactures OEM and custom metal bellows and bellows assemblies for demanding motion and flow control applications. Certified to AS9100D and ISO 9001:2015 standards, our precision-formed bellows are trusted across industries including aerospace, medical, renewable energy, transportation, industrial, and HVAC.

Available in single- or multi-ply stainless steel, Hastelloy, Inconel, Monel, and Titanium, Flex-Weld bellows deliver exceptional cycle life, fatigue resistance, and pressure containment. From safety-relief and valve-stem bellows to mechanical seal and precision instrument assemblies, our products are engineered for high-performance operation in even the most corrosive or high-temperature environments.

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Our capabilities

Custom-Engineered Bellows Design — Designed and manufactured to precise customer specifications for pressure, motion, spring rate, and fatigue life.
Wide Material Selection — Fabricated in stainless steel (304, 316, 321), Inconel, Monel, Hastelloy, Titanium, and other high-performance alloys.
Single- & Multi-Ply Construction — Multi-ply designs enhance flexibility, cycle life, and safety in high-pressure or corrosive environments.
Precision Forming & Welding — In-house hydroforming, rolling, and TIG welding ensure consistent geometry and superior quality control.
Comprehensive Testing — Helium leak testing, hydrostatic pressure testing, and dimensional inspection per AS9100D and ISO 9001:2015 standards.
Prototype-to-Production Capability — Rapid prototyping and scalable production for OEM, aerospace, medical, and industrial markets.
Integration & Assembly Expertise — Complete bellows assemblies including flanges, tubes, valve housings, and welded end fittings.
Performance Optimization — Engineered for specific spring rates, cycle life, and deflection requirements to maximize reliability and longevity.